Row houses line city streets across North America in long, uniform rows, each home shoulder to shoulder with its neighbors under one continuous roofline. The form is common in older cities worldwide, and a new generation of architects and planners in mid-density areas keeps borrowing its proportions for new builds. In the United Kingdom and Australia the same buildings are called terraced houses, and even within North America the terminology shifts city by city. Buyers like row houses because they are affordable, low-maintenance, and easy to sell, and owners are proving the old stock can be re-engineered: a solar second skin transformed a 1960s rowhouse into an energy-neutral home, and the same retrofit thinking now applies to rows built a century earlier.
Row House vs. Brownstone vs. Townhouse
A row house is one unit in a continuous row of identical or nearly identical attached homes sharing a roofline and one or both side walls. The term gets used interchangeably with townhouse and brownstone, but the three are not the same. A townhouse is defined by ownership and layout rather than style: it is a multi-level attached home, often single-family, and it does not have to match its neighbors. A brownstone is a townhouse or row house faced with the brownish-red sandstone that became the signature of 19th-century urban building.
Row houses were built for one or two families and are often subdivided into apartments today. They generally cost less than townhouses, which keeps them an entry point into expensive city markets. The attached construction also trims heating and cooling costs per square foot, and a well-insulated row can approach super-efficient performance: the work on a historic Philadelphia rowhouse shows how a classic urban unit achieves passive house results with the right envelope upgrades.
| Feature | Row house | Brownstone | Townhouse |
|---|---|---|---|
| Definition | Attached unit in a uniform row | Row or townhouse with brownstone facade | Any attached multi-level home |
| Typical cost | Lowest | Highest | Middle |
| Shared walls | Both sides | Both sides | Usually one or both |
| Common regions | Northeast, mid-Atlantic, UK | New York, Brooklyn, Boston | Nationwide |
Which term applies on a given street depends on the era and the region. A 19th-century brick row in Philadelphia is a row house; the same building faced in brownstone in Brooklyn is often called a brownstone; a new attached unit in a suburban development is almost always a townhouse.
What the Terms Share
All three forms are attached housing, and that changes everything about ownership: shared walls, shared maintenance decisions, and party-wall rules that do not exist for detached homes. Insurance, financing, and renovation all behave differently for attached units.
Cost and Market Differences
In most markets the price ladder runs row house below townhouse below brownstone, with brownstones carrying a premium for their facades and historical cachet. Renovation costs run in the same order, since brownstone restoration requires specialty masons and often triggers historic-district review.
What Drives Renovation Costs
Three factors push rowhouse renovation budgets up: party-wall work, which requires neighbor agreements; facade work, which may need period materials; and stair-only layouts, which complicate moving materials through the house. Budget 15 to 20 percent more than a comparable detached-home renovation.
The History of Row Houses
Row housing is one of the oldest urban housing forms. London’s Georgian terraces, built from the 17th century onward, set the pattern of identical houses sharing party walls behind a uniform facade. The form crossed the Atlantic with early city building, and Philadelphia, Baltimore, and Washington DC developed dense rowhouse neighborhoods through the 19th century as cities industrialized and land prices climbed.
The Washington DC row has its own character, with brick facades, raised stoops, and deep front gardens, and it attracts its own share of commentary, including first-hand neighborhood accounts like the DC rowhouse guest blogger writing about daily life in the city’s rows.
The 20th century pushed rowhouse construction into the suburbs, where developers built attached single-family rows as lower-cost alternatives to detached houses. Today the form is returning in mid-density infill projects, and the oldest rows keep selling because the proportions still work.
The 19th-Century Building Boom
Cities such as New York, Philadelphia, and Boston added rowhouse blocks by the hundreds in the 1800s. Standardized floor plans and shared walls let builders raise whole blocks at once, which held costs down and created the uniform streetscapes that define old urban neighborhoods.
Why the Form Spread So Fast
Three factors drove the boom: cheap standardized brick, steam-powered sawmills for framing lumber, and speculative builders who sold entire rows to investors. The same logic, build in volume to cut unit cost, still guides attached housing development today.
Where Row Houses Thrive Today
The classic rowhouse cities remain Philadelphia, Baltimore, Washington, New York, Boston, and San Francisco, with London, Dublin, and Amsterdam abroad. In the United States the most intact rowhouse neighborhoods sit in the Northeast and mid-Atlantic, where whole census tracts are still dominated by attached housing built before 1920.
A new generation of architects and planners borrows the form for mid-density development: three-to-five-story attached homes on narrow lots with modern insulation and energy systems. The hard part is deciding what to keep and what to change, and the approach of balancing old and new rowhouse renovation between historic preservation and modern design shows how owners thread that needle.
Row house architecture also shows up in adapted form in Chicago, New Orleans, and Charleston, where local materials and climates reshaped the basic template.
East Coast Strongholds
Philadelphia alone holds an estimated 100,000-plus rowhouses, one of the largest stocks in the world. Baltimore’s rows climb entire hillsides, and Washington’s Capitol Hill and Shaw neighborhoods are built of brick rows that once housed clerks and tradespeople.
Mid-Density New Builds
New rowhouse-style projects cluster in cities with high land costs and strong transit. Portland, Denver, and Seattle have all added attached infill housing in the last decade, often keeping the tall, narrow proportions of the originals while switching to modern floor plans and building systems.
Key Characteristics and Structural Features
Row houses follow a repeating pattern: a narrow frontage, typically 16 to 25 feet wide; a deep rectangular footprint; three to four stories in the classic form; and a stoop or ground-level entrance. Basements are standard, and most rows include a rear yard only a few feet wider than the house itself.
Shared Walls and Party Walls
The party wall between units is a structural firewall that both owners share. It carries the floors of both houses, so any modification, a pocket door, a new stair, or an electrical chase, requires a party-wall agreement in most jurisdictions. Sound travels through party walls, which is why insulation and air-sealing retrofits rank high on renovation lists.
Typical Layouts and Room Proportions
The classic plan runs one room deep and two rooms wide per floor: front parlor and rear kitchen on the ground floor, bedrooms above, and a full or partial basement below. The narrow footprint makes light management the central design problem, solved historically with tall windows, rear additions, and light courts.
Adding Space Within a Narrow Footprint
Because the footprint is fixed, most owners add space by going down into the basement or up into the attic rather than out. A finished basement or an attic dormer can add a full bedroom without touching the party walls, and projects like adding guest living space to a historic urban home show the pattern executed well.
Pros and Cons of Row House Living
What Owners Gain
Buyers get a lower price per square foot than detached homes in the same neighborhood, lower heating and cooling bills thanks to shared walls, minimal exterior maintenance since only the front and rear facades are exposed, and a built-in density that keeps transit, groceries, and amenities within walking distance.
Energy performance is the sleeper benefit. Attached homes lose heat through far less exterior surface than freestanding houses, and aggressive retrofits push the form further: the Northern Liberties passive rowhouse in Philadelphia shows what a full passive-house renovation delivers on an ordinary urban row.
What Owners Give Up
Street noise travels through party walls; roofing, facade, and water-penetration issues become shared decisions with neighbors; off-street parking is often limited or nonexistent; and stair-only floor plans grow harder to live in as owners age.
Sound and Privacy Trade-Offs
Party-wall sound is the most common complaint. Insulation, resilient channels, and double-layer drywall reduce transmission but never eliminate it, so buyers who need quiet should visit a unit during rush hour before committing.
What to Check Before Buying a Row House
Attached housing hides its problems in the shared envelope. Roof condition matters across the whole row, since one leaking roof can travel through party walls. Basement moisture is the single most common rowhouse defect, and the party-wall agreement defines who pays for what.
Inspection Priorities
Ask an inspector who works with attached housing to check:
- Roof age across the entire row, not just the unit
- Basement walls for efflorescence, cracks, and standing water
- Party-wall condition in the attic and basement
- Water staining on shared walls and ceilings
- Zoning status of any subdivided units
A Five-Step Pre-Purchase Checklist
- Review the party-wall agreement and shared maintenance obligations.
- Commission an inspection from an attached-housing specialist.
- Verify roof age and replacement reserves for the whole row.
- Check the basement after heavy rain, not just on a dry day.
- Confirm subdivision, zoning, and historic-district status.
Budgeting for Repairs
Set aside 1 to 3 percent of the home value annually for maintenance, with a larger reserve for shared items such as roofing and facade repointing. Historic-district homes add review costs to any exterior work, and party-wall projects can require legal fees on top of construction.